[FEATURE] Add multiple parameter in f:form.checkbox

This patch introduce the multiple parameter
for f:form.checkbox ViewHelper of fluid.

Resolves: #61529
Releases: master,6.2
Change-Id: Ic02b9aaeb19f09be438c18212c5b2f5842bf7468
Reviewed-on: http://review.typo3.org/33257
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Ernesto Baschny <ernst@cron-it.de>